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CH689024A5 - Welding sleeve made of a thermoplastic material. - Google Patents

Welding sleeve made of a thermoplastic material. Download PDF

Info

Publication number
CH689024A5
CH689024A5 CH02574/94A CH257494A CH689024A5 CH 689024 A5 CH689024 A5 CH 689024A5 CH 02574/94 A CH02574/94 A CH 02574/94A CH 257494 A CH257494 A CH 257494A CH 689024 A5 CH689024 A5 CH 689024A5
Authority
CH
Switzerland
Prior art keywords
welding
heating zone
sleeve
welding sleeve
heating
Prior art date
Application number
CH02574/94A
Other languages
German (de)
Inventor
Hans Werner Steinmetz
Dirk Alexander Petry
Original Assignee
Fischer Georg Rohrleitung
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fischer Georg Rohrleitung filed Critical Fischer Georg Rohrleitung
Publication of CH689024A5 publication Critical patent/CH689024A5/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/02—Welded joints; Adhesive joints
    • F16L47/03—Welded joints with an electrical resistance incorporated in the joint
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
    • B29C65/3476—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/347—General aspects dealing with the joint area or with the area to be joined using particular temperature distributions or gradients; using particular heat distributions or gradients
    • B29C66/3472—General aspects dealing with the joint area or with the area to be joined using particular temperature distributions or gradients; using particular heat distributions or gradients in the plane of the joint, e.g. along the joint line in the plane of the joint or perpendicular to the joint line in the plane of the joint
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • B29C66/52291—Joining tubular articles involving the use of a socket said socket comprising a stop
    • B29C66/52292—Joining tubular articles involving the use of a socket said socket comprising a stop said stop being internal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
    • B29C66/91651—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux by controlling or regulating the heat generated by Joule heating or induction heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3468—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the means for supplying heat to said heated elements which remain in the join, e.g. special electrical connectors of windings

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Surface Heating Bodies (AREA)
  • Control Of Resistance Heating (AREA)
  • Resistance Heating (AREA)

Description

       

  
 



  Die Erfindung betrifft eine Schweissmuffe aus einem thermoplastischen Material, wie sie im Oberbegriff von Anspruch 1 gekennzeichnet ist. 



  Derartige Schweissmuffen sind bekannt (z.B. CH-A 553 368) wobei diese zum Verbinden von zwei rohrförmigen Teilen aus Kunststoff eine oder zwei Heizzonen einer spiralförmigen Heizwicklung aufweisen. Jede Heizzone weist auf deren Länge eine gleichmässige Heizleistung auf. Da an den Enden jeder Heizzone der Wärmeverlust durch Wärmeabgabe an die Randzonen des Muffenkörpers grösser ist als im Mittelbereich der Schweisszone, entsteht eine für eine einwandfreie Schweissung nachteilige ungleichmässige Temperaturverteilung. Es können entweder im Mittelbereich der Schweisszone Überhitzungen mit Materialschädigung oder eine ungenügende Schweissung an den Enden der Heizzone entstehen. 



  Aufgabe der vorliegenden Erfindung ist die Schaffung einer Schweissmuffe der eingangs genannten Art, deren Heizwicklung für eine gleichmässige Wärmeverteilung in der oder den Heizzonen zur Erreichung einer einwandfreien Schweissverbindungen ausgebildet ist. 



  Erfindungsgemäss wird diese Aufgabe durch die kennzeichnenden Merkmale von Anspruch 1 gelöst. 



  Vorteilhafte Weiterbildungen der Erfindung sind in den davon abhängigen Ansprüchen gekennzeichnet. 



  Die Erfindung ist in den beiliegenden Zeichnungen beispielsweise dargestellt und nachfolgend beschrieben. Es zeigen: 
 
   Fig. 1 einen halbseitigen Längsschnitt einer Schweissmuffe und 
   Fig. 2 einen Teillängsschnitt einer Heizzone von Fig. 1 in vergrösserter Darstellung. 
 



  Fig. 1 zeigt eine Schweissmuffe 1 zum Verbinden von rohrförmigen Leitungsteilen 2, 2a aus thermoplastischem Kunststoff. Ein Muffenkörper 3 besteht aus einem inneren Muffenteil 4 und einem äusseren Muffenteil 5. Der innere Muffenteil 4 weist zwei Rillenpartien 6, 6a auf, in deren Rillen 7 ein Widerstandsdraht 8 verlegt ist. 



  Die beiden Rillenpartien 6, 6a bilden je eine Heizzone 9, 9a für das Verschweissen der rohrförmigen Leitungsteile 2, 2a mit der Schweissmuffe. Die beiden Heizzonen 9, 9a sind durch ein über dazwischen liegendes dickeres Wandteil 10 des inneren Muffenteils 4 geführtes Verbindungsteil 11 des Widerstandsdrahtes 8 miteinander verbunden. Der Widerstandsdraht 8 ist an seinen beiden Enden mit einem elektrischen Anschluss 12 versehen, welcher vorzugsweise als Kontaktstift ausgebildet ist. In den Bereichen 13 und 13a am Anfang und am Ende jeder Heizzone 9, 9a ist die Steigung 15 und somit der Wicklungsabstand geringer als im Mittelbereich 14. (Siehe Fig. 2) 



  Vorzugsweise vergrössert sich der Wicklungsabstand 15 jeweils vom Anfang und Ende der Heizzonen 9, 9a in den Bereichen 13, 13a bis zum Beginn des Mittelbereiches 14, wo der Wicklungsabstand 15 gleichbleibt. In den Bereichen 13, 13a ist der Wick lungsabstand 15 das 2- bis 5fache und im Mittelbereich 14 das 5- bis 8fache des Durchmessers (d) des Widerstandsdrahtes 8. 



  Die Länge L1 der Bereiche 13, 13a beträgt vorzugsweise 15 bis 25% der Gesamtlänge L2 der Heizzone 9, 9a. 



  Durch die grössere Windungsdichte am Anfang und Ende jeder Heizzone entsteht in den Bereichen 13, 13a eine grössere Heizleistung, wodurch eine Kompensation der in diesen Bereichen gegebenen grösseren Wärmeverlusten erfolgt, sodass im gesamten Bereich der Heizzone eine gleichmässige Schweissverbindung erreicht wird. 



  Bei der beschriebenen Schweissmuffe 1 wird der innere Muffenteil 4 mit den Rillen 7 im Spritzverfahren hergestellt, danach der Widerstandsdraht 8 aufgewickelt, in eine Spritzform eingelegt und durch Umspritzen der äussere Muffenteil 5 hergestellt, wobei durch eine Verbindung beider Muffenteile 4, 5 die fertige Schweissmuffe entsteht. 



  Die erfindungsgemässe Anordnung des Widerstandsdrahtes 8 in der oder den Heizzonen 9, 9a ist auch bei Schweissmuffen mit einem am Innenumfang des Muffenkörpers 3 in Rillen eingelegten Widerstandsdraht oder bei Schweissmuffen, bei denen der Widerstandsdraht 8 auf einen Dorn gewikkelt und dann in einer Spritzform der Muffenkörper 3 hergestellt wird, möglich. Bei diesen Ausführungen weist die Schweissmuffe einen einteiligen Muffenkörper 3 auf. 



  
 



  The invention relates to a welding sleeve made of a thermoplastic material, as characterized in the preamble of claim 1.



  Such welding sleeves are known (e.g. CH-A 553 368), which have one or two heating zones of a spiral heating coil for connecting two tubular parts made of plastic. Each heating zone has a uniform heating output over its length. Since the heat loss at the ends of each heating zone due to heat dissipation at the edge zones of the socket body is greater than in the central region of the welding zone, an uneven temperature distribution disadvantageous for a perfect welding occurs. Overheating with material damage or insufficient welding at the ends of the heating zone can occur either in the central area of the welding zone.



  The object of the present invention is to provide a welding sleeve of the type mentioned at the beginning, the heating winding of which is designed for uniform heat distribution in the heating zone or zones in order to achieve perfect welded connections.



  According to the invention, this object is achieved by the characterizing features of claim 1.



  Advantageous developments of the invention are characterized in the claims dependent thereon.



  The invention is illustrated, for example, in the accompanying drawings and described below. Show it:
 
   Fig. 1 is a half-sided longitudinal section of a welding sleeve and
   Fig. 2 is a partial longitudinal section of a heating zone of Fig. 1 in an enlarged view.
 



  Fig. 1 shows a welding sleeve 1 for connecting tubular conduit parts 2, 2a made of thermoplastic material. A sleeve body 3 consists of an inner sleeve part 4 and an outer sleeve part 5. The inner sleeve part 4 has two groove parts 6, 6a, in the grooves 7 of which a resistance wire 8 is laid.



  The two groove parts 6, 6a each form a heating zone 9, 9a for welding the tubular line parts 2, 2a to the welding sleeve. The two heating zones 9, 9a are connected to one another by a connecting part 11 of the resistance wire 8, which is led over a thicker wall part 10 of the inner sleeve part 4 lying between them. The resistance wire 8 is provided at both ends with an electrical connection 12, which is preferably designed as a contact pin. In areas 13 and 13a at the beginning and at the end of each heating zone 9, 9a, the slope 15 and thus the winding spacing is smaller than in the central area 14. (See FIG. 2)



  The winding spacing 15 preferably increases in each case from the beginning and end of the heating zones 9, 9a in the regions 13, 13a to the beginning of the central region 14, where the winding spacing 15 remains the same. In the areas 13, 13 a, the winding spacing 15 is 2 to 5 times and in the central area 14 the 5 to 8 times the diameter (d) of the resistance wire 8.



  The length L1 of the areas 13, 13a is preferably 15 to 25% of the total length L2 of the heating zone 9, 9a.



  The greater winding density at the beginning and end of each heating zone results in a greater heating output in the areas 13, 13a, as a result of which the greater heat losses in these areas are compensated for, so that a uniform welded connection is achieved in the entire area of the heating zone.



  In the described welding sleeve 1, the inner sleeve part 4 with the grooves 7 is produced by the spraying method, then the resistance wire 8 is wound up, inserted into an injection mold and the outer sleeve part 5 is produced by extrusion coating, the finished welding sleeve being produced by connecting the two sleeve parts 4, 5 .



  The arrangement according to the invention of the resistance wire 8 in the heating zone (s) 9, 9a is also in the case of welding sleeves with a resistance wire inserted into grooves on the inner circumference of the sleeve body 3 or in welding sleeves in which the resistance wire 8 is wound on a mandrel and then in an injection mold the sleeve body 3 is made possible. In these versions, the welding sleeve has a one-piece sleeve body 3.

Claims (5)

1. Schweissmuffe aus einem thermoplastischen Kunststoff mit einem Muffenkörper, bei welchem im Bereich dessen Innenwandung eine Wicklung aus einem Widerstandsdraht mit mindestens einer Heizzone eingebettet ist, dadurch gekennzeichnet, dass die Heizwicklung in einem Bereich (13, 13a) am Anfang und am Ende jeder Heizzone (9, 9a) eine geringere Steigung (15) aufweist als im Mittelbereich (14) der Heizzone (9, 9a).     1.Welding sleeve made of a thermoplastic material with a sleeve body, in which a winding made of a resistance wire with at least one heating zone is embedded in the area of the inner wall thereof, characterized in that the heating winding in an area (13, 13a) at the beginning and at the end of each heating zone (9, 9a) has a smaller slope (15) than in the central region (14) of the heating zone (9, 9a). 2. Schweissmuffe nach Anspruch 1, dadurch gekennzeichnet, dass der Muffenkörper aus einem inneren Muffenteil (4) mit dem in Rillen (7) angeordneten Widerstandsdraht (8) und einem kammartig in die Rillen (7) eingreifenden äusseren Muffenteil (5) besteht. 2. Welding sleeve according to claim 1, characterized in that the sleeve body consists of an inner sleeve part (4) with the resistance wire (8) arranged in grooves (7) and a comb-like outer sleeve part (5) engaging in the grooves (7). 3. 3rd Schweissmuffe nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Steigung (15) in den Bereichen (13, 13a) am Anfang und Ende der Heizzonen (9, 9a) jeweils von deren Enden ausgehend bis zum Mittelbereich (14) sich kontinuierlich vergrössert.  Welding sleeve according to claim 1 or 2, characterized in that the slope (15) in the areas (13, 13a) at the beginning and end of the heating zones (9, 9a) increases continuously from their ends to the central area (14). 4. Schweissmuffe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Steigung (15) im Anfang- und End-Bereich (13, 13a) das 2- bis 5fache und im Mittelbereich (14) das 5- bis 8fache des Durchmessers (d) des Widerstandsdrahtes (8) beträgt. 4. Welding sleeve according to one of claims 1 to 3, characterized in that the slope (15) in the start and end area (13, 13a) 2 to 5 times and in the central area (14) 5 to 8 times the diameter (d) of the resistance wire (8). 5. Schweissmuffe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Länge (L1) des Anfang- und End-Bereiches (13, 13a) jeweils 15 bis 25% der Gesamtlänge (L2) der Heizzone (9, 9a) beträgt. 5. Welding sleeve according to one of claims 1 to 4, characterized in that the length (L1) of the start and end area (13, 13a) is in each case 15 to 25% of the total length (L2) of the heating zone (9, 9a) .  
CH02574/94A 1993-09-22 1994-08-22 Welding sleeve made of a thermoplastic material. CH689024A5 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4332196A DE4332196C2 (en) 1993-09-22 1993-09-22 Welding socket made of thermoplastic material

Publications (1)

Publication Number Publication Date
CH689024A5 true CH689024A5 (en) 1998-07-31

Family

ID=6498303

Family Applications (1)

Application Number Title Priority Date Filing Date
CH02574/94A CH689024A5 (en) 1993-09-22 1994-08-22 Welding sleeve made of a thermoplastic material.

Country Status (7)

Country Link
US (1) US5532459A (en)
JP (1) JPH07151290A (en)
CH (1) CH689024A5 (en)
DE (1) DE4332196C2 (en)
ES (1) ES2119599B1 (en)
FR (1) FR2710391B1 (en)
GB (1) GB2282201B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3031599A1 (en) 2014-12-11 2016-06-15 Georg Fischer Rohrleitungssysteme AG Insulated electrofusion fitting

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4422372A1 (en) * 1994-06-27 1996-01-04 Gruber Alois Agru Gmbh Process for welding plastic pipes and sleeves to carry out the process
US6395127B1 (en) 1999-04-18 2002-05-28 Entegris, Inc. Insert for use in conjoining tubular end portions
EP2450176A1 (en) 2010-11-04 2012-05-09 Georg Fischer Rohrleitungssysteme AG Heating coil welded fitting
WO2013036280A1 (en) * 2011-09-11 2013-03-14 Barnings Kristopher System and method for protecting a machine readable card
US9378442B2 (en) 2011-09-11 2016-06-28 Cp Security, Llc System and method for protecting a machine readable card
CA2828855C (en) 2013-09-27 2020-06-09 G.B.D. Corp. Method and apparatus for connecting pipes
CA2829075C (en) 2013-09-27 2020-09-01 G.B.D. Corp. Pipe joining material for connecting pipes
CA2829002C (en) 2013-09-27 2020-06-09 G.B.D. Corp. Pipe cutting tool and methods for use
CA2829041C (en) 2013-09-27 2020-06-09 G.B.D. Corp. Pipe sealing tool and methods for use
CA2863272C (en) 2014-09-12 2016-10-18 G.B.D. Corp. Method of joining pipes and fittings
CA2888402C (en) 2015-04-16 2017-10-31 G.B.D. Corp. Method of joining pipes and fittings with mechanical restraint members
US20240392908A1 (en) * 2023-05-22 2024-11-28 Georg Fischer Central Plastics Llc Self Restraining Electrofusion Fitting

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL175458C (en) * 1973-03-14 1984-11-01 Sturm Werner METHOD FOR MANUFACTURING A WELDING SOCKET FOR THERMOPLASTIC TUBES.
CH553368A (en) * 1973-03-14 1974-08-30 Sturm Werner Pipe joint sleeve with integral heating wire - made from coaxial components with helically grooved surfaces
CH606895A5 (en) * 1975-12-18 1978-11-15 Geberit Ag
DE3162144D1 (en) * 1980-03-10 1984-03-15 Fischer Ag Georg Weld joint for thermoplastic pipes
CH648393A5 (en) * 1980-08-29 1985-03-15 Werner Sturm ELECTRIC WELDING SOCKET FROM A THERMOPLAST FOR CONNECTING PIPE ELEMENTS FROM THERMOPLAST.
CH657907A5 (en) * 1982-06-23 1986-09-30 Von Roll Ag SLEEVE MADE OF THERMOPLASTIC MATERIAL FOR CONNECTING PIPE ELEMENTS.
US4626308A (en) * 1983-02-18 1986-12-02 The Victaulic Company Plc Method of making welded pipe joints
NL8400816A (en) * 1984-03-14 1985-10-01 Wavin Bv METHOD FOR MANUFACTURING TUBE MUFF AND FITTINGS, AND APPARATUS FOR CARRYING OUT THIS METHOD AND TUBE SOCKET OR FITTING MADE ACCORDING TO THIS METHOD
US4931116A (en) * 1986-05-27 1990-06-05 Raychem Corporation Heat-recoverable coupler
CH685403A5 (en) * 1991-07-22 1995-06-30 Fischer Georg Rohrleitung Molding of thermoplastic material.
DE4203626C2 (en) * 1992-02-08 1993-11-04 Fischer Georg Rohrleitung WELDING SLEEVE AND METHOD FOR THE PRODUCTION THEREOF

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3031599A1 (en) 2014-12-11 2016-06-15 Georg Fischer Rohrleitungssysteme AG Insulated electrofusion fitting

Also Published As

Publication number Publication date
GB2282201A (en) 1995-03-29
ES2119599A1 (en) 1998-10-01
ES2119599B1 (en) 1999-07-01
DE4332196C2 (en) 1996-09-19
FR2710391A1 (en) 1995-03-31
US5532459A (en) 1996-07-02
GB2282201B (en) 1997-11-05
GB9418952D0 (en) 1994-11-09
DE4332196A1 (en) 1995-03-23
FR2710391B1 (en) 1996-01-19
JPH07151290A (en) 1995-06-13

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